Manufacture of trisodium phosphate with hydrated sodium carbonate.



UNITED STATES rn rnnir OFFICE.

WILLIAM E. RIDENOUR, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO FRANKLINCHEMICAL WORKS, OF PHILADELPHIA, -PENNSYLVANIA, A CORPORATION OFPENNSYLVANIA.

MANUFACTURE OF TRISODIUM PHOSPHATE WITH HYDRATED SODIUM CARBONATE.

No Drawing.

To all whom 'it may concern:

Be it known that I, WILLIAM E. RIDENOUR, a citizen of the United States,residing in the city of Philadelphia, county of Phila delphia, andState-of Pennsylvania, have invented certain Improvements in theMannfacture of Trisodium Phosphate with Hydrated Sodium Carbonate.

My present improvements comprise, in the preferred form, anon-crystalline compound produced by combining, sodium carbonate,disodium phosphate, Water and caustic soda (suitably in the proportionof two hundred and fifty pounds of sodium car bonatein the form of sodaash of 58% or 48%, two hundred and fifty pounds of sodium phosphate,ninety-two pounds of water, and sixty-four pounds of caustic soda in theform of a solution), with the production of tri-sodium phosphate andhydrated sodium carbonate.

' In practice the sodium carbonate and sodium phosphate may beintimately ,mixed together and the combined water and caustic sodagradually added thereto While the mass is constant-1y stirreduntilcooled; the water added being insufficient in amount to dissolvethe sodium carbonate, the chemical reaction efi'ected being accompaniedby the evolution of a large amount of steam and heat, the resulting,product bein a dry, pulverulent mass consisting of mec anically mixedtri-sodium phosphate and hydrated sodium carbonate, in a formparticularly useful in the arts, particularly as a boiler compound andfor the usual purposes thereof.

A true chemical reaction with the production of a non-crystallineproduct may be obtained by combining sodium carbonate, sodium phosphateand Water, as by adding water to the combined carbonate and phosphateWithout dissolving the carbonate, the operation being accompanied bystirring, with evolution of steam and heat, until the product is cooledand the result being a dry 'pulverulent mass. This mass, consisting ofhydrated sodium carbonate and disodlum phosphate mechanically mixed, innon-crystalline form, may be used at once or at any time subsequentlyfor combination with any i Specification of Letters Patent.

Patented Feb. 22, 1910.

Application filed July 29, 1908. Serial No. 445,897.

in amorphous form, and mechanically mixed With the amorphous hydratedsodiumcarbonate.

By these operations I am enabled to get a desired mechanical mixture ofhydrated sodium carbonate with .a comparatively high percentage oftri-sodium phosphate, in a desired form, Without resort to the moreexpensive process of crystallization, reduction and mechanically mixing.

It will be understood that the operations may be varied within the scopeof my invention, as by dissolving the phosphate of soda in hot water andadding this to the sodium carbonate, or using dry caustic sodaequivalent to the caustic in solution.

Having described my invention, I claim:

1. The herein described composition of matter consisting of thecombination ofsodium carbonate, a chemical salt, and Water so as toproduce a' non-crystalline product,

substantially as specified. I

2. The herein, described composition of matter consisting of thecombination of bonate being accompanied by stirring and the amount ofWater so added being insufficient to dissolve the carbonate, substantiallyas specified. p

5. The process herein described Whlch consists of the vacts of combiningsodium carbonate, phosphate of soda, caustic soda and Water,approximately in the proportion of two hundred and fifty pounds ofsodium carbonate in the form of soda ash, two hundred and fifty poundsof phosphate of soda,

ninety-five pounds of water, and the equiv- In witness whereof I havehereunto set alent of sixty-four pounds of caustic soda my name this22nd day of July, A. D. 1908, 10 solutiofi. h v d in the presence of thesubscribing Witnesses.

6. T e rocess erein describe which consists of 131 1 6 acts of combiningsodium car- RIDENOUR' bonate, phosphate of soda, a caustic alkali,\Vitnesses: and Water without dissolving the sodium ROBERT JAMES EWING,

, carbonate. Joe. G. DENNY, Jr.

